Malicious PDF — malware analysis report

Static analysis result for SHA-256 e160ad511fef9d98…

MALICIOUS

PDF

70.8 KB Created: 2021-01-06 04:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7816cbf551ef14744969cca131bc601e SHA-1: 795501cadc9cc71b6df88824b465e1f7f2732e84 SHA-256: e160ad511fef9d98562deb50a2cdb2577940a0e1f866ca496369a673018a4d8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=timpanogos+high+school+faculty'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of a malicious URL within the document structure indicates an attempt to redirect the user to a harmful site, consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?utm_term=timpanogos+high+school+faculty In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fac5fb891bb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5f972850599d5.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/djbZUjg/xovazogiwosaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_5fbb7d104a2e1.pdfIn PDF document text
    • https://dujepevuzewu.weebly.com/uploads/1/3/4/3/134313590/kagew-lesupa-woluzuve-rasezuteluji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8c80843d6ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovuzize/arabic_letters_activity_book.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/masixufuwateruzigu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/76957736593.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/xisivufeto.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 5384 bytes
SHA-256: dc66e817cc1ab6a26c5db7903e54194b0267ab2835f20f3a9f9943b8f4fec3de
font_01_sfnt_off0000ea49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 10656 bytes
SHA-256: 32d38e08e3815edd27a329acdf46f39f86c9fb980b17210cfcbaa9fa787af6ba

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